colorful screen solar power tire pressure monitoring system TPMS 4external sensorThis solar TPMS is very popular&comma;developed and produced by our company&period; the screen is colorful &comma;looking very nice&period; could put on any place of the cars&period;it is portable&period; Real-time monitoring the tire&period;so keep car users know their tire states much&comma;so it is very neccessory to use TPMS&period;External sensor could be DIY installed&period;